Of Orcs And Men

There are chests hidden throughout the game. Most of them will be in optional side missions, so to get this trophy you will need to do most if not all of the side missions. The chests do not show up on the map, so keep an eye open for them and try not to miss any.

1. Entrance to Shantytown, just before entering the Black Hand Camp. You will have to fight a group of guards and one orc, it is just off to the right. - Chapter One
2. In Jared’s camp. Obath will ask you to kill Jared. Agree and head over there. After you have dispatched him, grab the chest in the area. - Chapter Two
3. Just after you deal with Jared, you will enter an area with quite a few soldiers. Once you have killed them all, there will be a fairly obvious chest in the area. - Chapter One
4. During the quest to purge the Scourge, you will come across this chest. It will be in the area where you intercept the second wave. - Chapter One
5. As you are on your way to burn the chapel, you will find this in an alley that you have to pass through, with only one guard and a few civilians (and a cow) there. - Chapter One
6. In the sewers there will be a giant fork in the path. Go down the path that leads to a dead end, this chest will be obvious in the middle of a large group of goblins. - Chapter One
7. On the quest to kill the Head Foreman, just before you get to the last area there is a fork off to the side. There will be a chest in there. - Chapter Two
8. After killing the Head Foreman, talk to Ardek again and ask about the remaining foremen. You will be transported to deal with them. In the second main area, you will find this chest. - Chapter Two
9. When you are assaulting the Inquisition base, this will be in the last area before you leave the Pillar. - Chapter Two
10. In the last floor before you reach Arkence, you will find this box in a large room off to the side. It will be fairly hard to miss if you are checking your map regularly. - Chapter Three
11. In the monastery, as you are trying to escape, take a right into a small side passage and you will find a chest. - Chapter Four
12. In the Island of Laments, after escaping the monastery, you will find this chest just before arriving at the palace. It will be in a small nook guarded by a number of guards. - Chapter Four

You will have to do two playthroughs to get this trophy, since you need 20 for the trophy, and there are only 12 in one playthrough.